Alert archive / Iowa / Johnson County / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Johnson County, Iowa, 2026

41 severe thunderstorm warnings in 2026. An alert counts here when it covered this county. The archive of severe thunderstorm warnings reaches back to 1986.

Johnson County and its neighbors

Each county as a circle sized by its count in 2026. Tap one for its archive.

Severe Thunderstorm Warnings
41
Busiest month
April14 severe thunderstorm warnings
Busiest day
June 11, 20265 severe thunderstorm warnings

Over time

By month

The alerts

Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Jan 8, 7:18 PM CSTSevere Thunderstorm WarningDVN42 min
Mar 10, 6:57 PM CDTSevere Thunderstorm WarningDVN48 min
Mar 10, 6:59 PM CDTSevere Thunderstorm WarningDVN26 min
Mar 15, 9:19 AM CDTSevere Thunderstorm WarningDVN26 min
Mar 31, 12:36 AM CDTSevere Thunderstorm WarningDVN22 min
Mar 31, 9:30 AM CDTSevere Thunderstorm Warning Considerable damage threatDVN45 min
Apr 2, 3:59 PM CDTSevere Thunderstorm WarningDVN61 min
Apr 2, 4:56 PM CDTSevere Thunderstorm WarningDVN64 min
Apr 14, 5:21 PM CDTSevere Thunderstorm WarningDVN24 min
Apr 14, 5:34 PM CDTSevere Thunderstorm Warning Considerable damage threatDVN41 min
Apr 14, 6:06 PM CDTSevere Thunderstorm WarningDVN39 min
Apr 15, 7:09 PM CDTSevere Thunderstorm WarningDVN66 min
Apr 17, 12:59 PM CDTSevere Thunderstorm WarningDVN61 min
Apr 17, 3:24 PM CDTSevere Thunderstorm WarningDVN66 min
Apr 17, 3:29 PM CDTSevere Thunderstorm WarningDVN76 min
Apr 17, 5:12 PM CDTSevere Thunderstorm Warning Destructive damage threatDVN63 min
Apr 23, 9:13 PM CDTSevere Thunderstorm WarningDVN47 min
Apr 23, 9:36 PM CDTSevere Thunderstorm WarningDVN39 min
Apr 23, 10:15 PM CDTSevere Thunderstorm WarningDVN60 min
Apr 23, 11:13 PM CDTSevere Thunderstorm WarningDVN47 min
Jun 10, 11:26 AM CDTSevere Thunderstorm WarningDVN64 min
Jun 10, 11:38 AM CDTSevere Thunderstorm WarningDVN67 min
Jun 10, 5:30 PM CDTSevere Thunderstorm WarningDVN60 min
Jun 11, 8:19 AM CDTSevere Thunderstorm Warning Considerable damage threatDVN71 min
Jun 11, 8:31 AM CDTSevere Thunderstorm Warning Considerable damage threatDVN74 min
Jun 11, 8:34 AM CDTSevere Thunderstorm Warning Destructive damage threatDVN56 min
Jun 11, 9:18 AM CDTSevere Thunderstorm Warning Considerable damage threatDVN52 min
Jun 11, 9:35 AM CDTSevere Thunderstorm WarningDVN37 min
Jun 13, 12:59 PM CDTSevere Thunderstorm WarningDVN46 min
Jun 17, 5:52 AM CDTSevere Thunderstorm WarningDVN53 min
Jun 17, 6:45 AM CDTSevere Thunderstorm Warning Considerable damage threatDVN60 min
Jun 17, 7:08 AM CDTSevere Thunderstorm Warning Destructive damage threatDVN52 min
Jul 4, 4:25 AM CDTSevere Thunderstorm WarningDVN65 min
Jul 20, 10:51 AM CDTSevere Thunderstorm WarningDVN54 min
Jul 20, 5:11 PM CDTSevere Thunderstorm Warning Considerable damage threatDVN79 min
Aug 7, 5:26 PM CDTSevere Thunderstorm WarningDVN36 min
Aug 12, 4:37 AM CDTSevere Thunderstorm WarningDVN53 min
Aug 12, 5:25 AM CDTSevere Thunderstorm WarningDVN65 min
Sep 8, 8:18 PM CDTSevere Thunderstorm WarningDVN57 min
Sep 8, 9:07 PM CDTSevere Thunderstorm Warning Considerable damage threatDVN46 min
Sep 20, 1:18 AM CDTSevere Thunderstorm WarningDVN57 min

The busiest days

Days with the most alerts issued, by UTC date.

  1. June 11, 20265severe thunderstorm warnings
  2. April 17, 20264severe thunderstorm warnings
  3. April 24, 20264severe thunderstorm warnings
  4. April 14, 20263severe thunderstorm warnings
  5. June 10, 20263severe thunderstorm warnings
  6. June 17, 20263severe thunderstorm warnings
  7. March 10, 20262severe thunderstorm warnings
  8. March 31, 20262severe thunderstorm warnings
  9. April 2, 20262severe thunderstorm warnings
  10. July 20, 20262severe thunderstorm warnings

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive2025

Sources

National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.